Figure 1
From: Inverted Silicon Nanopencil Array Solar Cells with Enhanced Contact Structures
45° angle-view SEM images of silicon nanopillar (a), nanocone (b) and nanopencil (c) arrays obtained by the wet anisotropic etching. The structural pitch, pillar base diameter and height are 1.27 μm, 0.6 μm and 2 μm, respectively. The tip height and angle are controlled to be around 1 μm and 45° for the nanopencil, accordingly.
